Injecting DAO service through constructor to allow easier mocking

[sumitsarkar]

What's this PR for?

Fixes #22

This PR is to enable constructor injection of the DB related dependencies. This will allow us to easily mock the injected dependency and then test the scraper implementation.

What to emphasize on when reviewing?

• Constructor injections.
• The new abstract class to separate the notion of scraper and one that "scrapes and saves the data" ( Not sure if this one is actually required. Might be an overkill )

[codecov-io]

Codecov Report

Merging #23 into master will increase coverage by 0.01%.
The diff coverage is 0%.

@@             Coverage Diff             @@
##             master     #23      +/-   ##
===========================================
+ Coverage       2.2%   2.21%   +0.01%     
  Complexity        7       7              
===========================================
  Files            19      20       +1     
  Lines          1771    1759      -12     
  Branches        389     389              
===========================================
  Hits             39      39              
+ Misses         1723    1711      -12     
  Partials          9       9

Impacted Files	Coverage Δ	Complexity Δ
...eops/tauro/cli/scraper/basicauth/DLinkScraper.java	0% <0%> (ø)	0 <0> (ø)	⬇️
.../tauro/cli/authtrial/threads/DefaultAuthTrial.java	0% <0%> (ø)	0 <0> (ø)	⬇️
...ro/cli/scraper/basicauth/NewIBallBatonScraper.java	0% <0%> (ø)	0 <0> (ø)	⬇️
...s/tauro/cli/scraper/basicauth/DigiflipScraper.java	0% <0%> (ø)	0 <0> (ø)	⬇️
...ops/tauro/cli/scraper/AbstractScraperAndSaver.java	0% <0%> (ø)	0 <0> (?)
...uro/cli/scraper/basicauth/IBallWrx300NScraper.java	0% <0%> (ø)	0 <0> (ø)	⬇️
...ain/java/org/koreops/tauro/cli/dao/UpdaterDao.java	0% <0%> (ø)	0 <0> (ø)	⬇️
src/main/java/org/koreops/tauro/cli/TauroMain.java	0% <0%> (ø)	0 <0> (ø)	⬇️
...ops/tauro/cli/scraper/formauth/ActBeamScraper.java	0% <0%> (ø)	0 <0> (ø)	⬇️
...ops/tauro/cli/scraper/basicauth/TpLinkScraper.java	0% <0%> (ø)	0 <0> (ø)	⬇️
... and 6 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 5adce8c...6f470aa. Read the comment docs.

[katsadim]

A small suggestion here: #21 (comment)